Earthquake Analysis of Reinforced Concrete Buildings with Plan and Mass Asymmetry

Abstract

Earthquakes can have a significant and often destructive effect on built structures, depending on various factors such as the building's design, construction materials, location, and the intensity of the earthquake. A structure can be classified as irregular if it contains irregular distributions of mass, stiffness, and strength or due to irregular geometrical configurations.

This research paper investigates the earthquake behaviour of plan and mass asymmetry reinforced concrete structures. The study is done for G+5 RC framed multi-storey building with fixed support conditions. Response spectrum analysis is performed using commercial software ETABS 2016 and IS code IS 1893:2002 (some clauses from IS 1893:2016). The storey displacement, storey drift, overturning moment, storey stiffness, natural time period, and various mode are obtained and compared to analyse the seismic behaviour of plan and mass asymmetry reinforced concrete structures. All the analyses have been carried out for various models of box, plus, C, I, L, T, and mass asymmetry with all models floor slabs as semi-rigid diaphragms and the results so obtained have been compared.